A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2321> ====================================================================== Reported By: doobedoobedo Assigned To: Clemens Ladisch ====================================================================== Project: ALSA - driver Issue ID: 2321 Category: USB - usb-audio Reproducibility: always Severity: major Priority: normal Status: assigned Distribution: Gentoo Kernel Version: 2.6.14/5 ====================================================================== Date Submitted: 08-01-2006 16:43 CEST Last Modified: 08-05-2006 17:16 CEST ====================================================================== Summary: no audio and very few mixer options with C-Media 106 based USB sound card Description: no audio output with the snd-usb-audio module amixer output: Simple mixer control 'PCM',0 Capabilities: cvolume cswitch cswitch-joined Capture channels: Front Left - Front Right Limits: Capture 0 - 4095 Front Left: Capture 2048 [50%] [on] Front Right: Capture 2048 [50%] [on] Simple mixer control 'PCM Capture Source',0 Capabilities: enum Items: 'Mic' 'Input 1' 'Input 2' 'Mixer' Item0: 'Mic' Simple mixer control 'PCM',1 Capabilities: cvolume Capture channels: Front Left - Front Right Limits: Capture 0 - 4095 Front Left: Capture 2048 [50%] Front Right: Capture 2048 [50%] Simple mixer control 'Mic',0 Capabilities: pvolume cvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 8191 Capture 0 - 4095 Front Left: Playback 2048 [25%] [off] Capture 2048 [50%] Front Right: Playback 2048 [25%] [off] Capture 2048 [50%] Simple mixer control 'Auto Gain Control',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 8191 Mono: Front Left: Playback 2048 [25%] [on] Front Right: Playback 2048 [25%] [on] Simple mixer control 'Speaker',1 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 37 Mono: Playback 15 [41%] [on] speaker 0 and mic will only decrease in volume in alsamixer, although no sound is played trough the speakers at all. ====================================================================== ---------------------------------------------------------------------- rlrevell - 08-04-06 02:06 ---------------------------------------------------------------------- You should add some printk()s to debug it. First, verify that it is recognizing your device and the USB id matches right. Then, try changing the usbmix_name_map table around. For example create 10 entries and label them "Master 1-10", etc. ---------------------------------------------------------------------- doobedoobedo - 08-05-06 17:16 ---------------------------------------------------------------------- Good idea, the usb ids matched but the indexes in the map don't correspond to those in asound.state (but I believe they correspond to the bUnitID as output by lsusb -v ?) my patch ended up: --- alsa-driver-1.0.11.orig/alsa-kernel/usb/usbmixer_maps.c 2006-03-16 08:25:56.000000000 +0000 +++ alsa-driver-1.0.11/alsa-kernel/usb/usbmixer_maps.c 2006-08-05 12:35:17.000000000 +0100 @@ -234,6 +234,13 @@ { 0 } /* terminator */ }; +/* C-Media 106 based card from Asound - hack to get only working volume control marked as Master */ +static struct usbmix_name_map cm106_map[] = { + { 12, "Master Playback Switch"}, + { 13, "Master Playback"}, + { 0 } /* terminator */ +}; + /* * Control map entries */ @@ -276,6 +283,10 @@ .id = USB_ID(0x0c45, 0x1158), .map = justlink_map, }, + { + .id = USB_ID(0x0d8c, 0x0006), + .map = cm106_map, + }, { 0 } /* terminator */ }; Unfortunately mythtv still doesn't like it as it's a mono mixer and it expects stereo :/. looks like I need to write an external volume control script... which means I don't need the patch. I have, however, learnt something :) Issue History Date Modified Username Field Change ====================================================================== 08-01-06 16:43 doobedoobedo New Issue 08-01-06 16:43 doobedoobedo Distribution => Gentoo 08-01-06 16:43 doobedoobedo Kernel Version => 2.6.14/5 08-01-06 16:51 doobedoobedo Issue Monitored: doobedoobedo 08-01-06 16:54 doobedoobedo Note Added: 0011376 08-03-06 03:40 doobedoobedo Note Added: 0011393 08-03-06 17:34 doobedoobedo Note Added: 0011404 08-03-06 19:15 rlrevell Note Added: 0011407 08-03-06 20:32 doobedoobedo Note Added: 0011408 08-03-06 20:37 rlrevell Note Added: 0011409 08-03-06 23:02 doobedoobedo Note Added: 0011410 08-03-06 23:13 rlrevell Note Added: 0011411 08-04-06 00:58 doobedoobedo Note Added: 0011412 08-04-06 01:21 rlrevell Note Added: 0011413 08-04-06 01:31 rlrevell Note Added: 0011414 08-04-06 01:54 doobedoobedo Note Added: 0011415 08-04-06 02:06 rlrevell Note Added: 0011416 08-05-06 17:16 doobedoobedo Note Added: 0011438 ====================================================================== ------------------------------------------------------------------------- Take Surveys. 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